Corey

Popular questions and responses by Corey
  1. chemistry

    How many moles of solid Ba(NO3)2 should be added to 300 ml of .2 M Fe(NO3)3 to increase the concentration of NO3- ion to 1 M?

    asked on October 3, 2007
  2. physics

    A 65.0-kg runner has a speed of 5.20 m/s at one instant during a long-distance event. (a) what is the runner's kinetic energy at this instant? (b) if he doubles his speed to reach the finish line, by what factor does his kinetic energy change

    asked on March 1, 2012
  3. math

    First grade math Tell the Rule? Group 1 3 flowers w/4 petals each Group 2 3 flowers w/five petals each in triangle?

    asked on January 17, 2008
  4. chemistry

    how many protons and nuetrons are contained in the nucleus of each of the following atoms? assuming each atom is uncharged, how many electrons are present? a. 235/92U b. 13/6C c. 57/26Fe d. 208/82Pb e. 86/37Rb f. 41/20Ca

    asked on September 20, 2009
  5. math

    Elmer has a collection of 300 fossils. Of these, 21%, percent are fossilized snail shells.

    asked on June 21, 2017
  6. chemistry

    What is the finaly concentration of barium ions, Ba2+, in soulution with 100 ml of .1 M BaCl2 is mixed with 100ml of .05M H2SO4?

    asked on October 3, 2007
  7. chemistry

    A 1.0 L sample of an aqueous solution contains .1 mol of NaCl and .1 mole of CaCl2. What is the minimum number of moles of AgNO3 that must be added to the solution in order to precipitate all of the Cl(1- charge) as AgCl?(assume that AgCl is insoluble.)

    asked on October 3, 2007
  8. Math help

    55h + 275 = 440 Do I subtract 55 from 275 ?

    asked on May 16, 2013
  9. College English

    I submitted this yesterday and Ms. Sue thought I did well (except 7,11) but I still managed to get 4 wrong - and my mind is a mess trying to figure out where I went wrong! Please help - my mid is coming! >> represents my chosen answer. 1. Having studied

    asked on September 7, 2010
  10. math

    how can addition properties help me add whole numbers?

    asked on October 2, 2013
  11. AP chem

    This is part of a marathon problem, we have to identify the five compunds of H, N, and O described below. For each compound, I have to write a Lewis structure that is consistent with the information given. a.) All the compunds are electrolytes, although

    asked on November 7, 2007
  12. science

    calculate the mass in kg of an object that weighs 1225 n on earth

    asked on May 19, 2008
  13. AP Physics

    A person jumps from the roof of a house 3.0 m high. When he strikes the ground below, he bends his knees so that his torso decelerates over an approximate distance of 0.60 m. The mass of his torso (excluding legs) is 48 kg. *How do I find the average force

    asked on November 13, 2008
  14. Calculus

    Breathing is cyclic and a full respiratory cycle from the beginning of inhalation to the end of exhalation takes about 5 seconds. The maximum rate of air flow into the lungs is about 0.5 L/s. This explains, in part, why the function f(t)=1/2sin(2pi t/5)

    asked on September 11, 2017
  15. Phyics

    An object in simple harmonic motion has an amplitude of 0.202 m and an oscillation period of 0.620 s. Determine the maximum speed of the motion.

    asked on November 16, 2013
  16. math

    identify the two numbers less than 20 with the most factors

    asked on November 7, 2012
  17. math

    A car license plate consists of 6 characters. The first 3 characters are letters excluding I, O, Q and U. The last 3 characters are any of the numerals 0 to 9 inclusive. How many different license plates are possible? Please show your work.

    asked on May 23, 2011
  18. Physics

    fully loaded, slow-moving freight elevator has a cab with a total mass of 1250 kg, which is required to travel upward 58 m in 3.4 min, starting and ending at rest. The elevator's counterweight has a mass of only 1005 kg, and so the elevator motor must

    asked on November 4, 2009
  19. physics

    A grinding wheel 0.40 m in diameter rotates at 2200 rpm. What is the acceleration of a point on the edge of the grinding wheel?

    asked on October 31, 2010
  20. College English

    I have been pouring over this all day and would appreciate if someone could look this over for me with some good news... am I getting it? Gracias! >> represents my chosen answer. 1. Having studied small engine repair in night school, fixing the lawn mower

    asked on September 6, 2010
  21. Reading math

    on January they sold 139 more Doughlas firs than Noble firs. The toal trees sold was 377. which of these is right for me to solve it?? n-139=377 n+139 = 377 2n +139 =377 2n+139 = 377 I think it is the first one??

    asked on May 16, 2013
  22. Finance

    Ten years ago, Levin Inc. earned $0.50 per share. Its earnings this year were $2.20. What was the growth rate in Levin's earnings per share (EPS) over the 10-year period?

    asked on March 2, 2011
  23. Physic

    A 2.0 kg box moves back and forth on a horizontal frictionless surface between two different springs with one 32 N/cm and the other at 16 N/cm.The box is initially pressed against the stronger spring, compressing it 3.5 cm , and then is released from rest.

    asked on November 24, 2017
  24. geometry

    The volume of a cylinder is 980 in.4072-07-02-02-00_files/i0220001.jpg. The height of the cylinder is 20 in. What is the radius of the cylinder? Express your answer to the nearest hundredth.

    asked on July 13, 2014
  25. Physics

    A 44 m diameter wheel accelerates uniformly about its center from 110 rpm to 320 rpm in 3.9 s. Determine the radial component of the linear acceleration of a point on the edge of the wheel 1.0 s after it has started accelerating.

    asked on October 31, 2010
  26. physics

    A 44 m diameter wheel accelerates uniformly about its center from 110 rpm to 320 rpm in 3.9 s. Determine the radial component of the linear acceleration of a point on the edge of the wheel 1.0 s after it has started accelerating.

    asked on October 31, 2010
  27. Physics

    A 10.0 g object moving to the right at 19.0 cm/s makes an elastic head-on collision with a 15.0 g object moving in the opposite direction at 30.0 cm/s. Find the velocity of each object after the collision.

    asked on November 7, 2012
  28. physics 2

    1) A spherical surface completely surrounds a collection of charges. Find the electric flux through the surface if the collection consists of a single +3.93E-6 C charge. 2) A plate carries a charge of -2.52μC, while a rod carries a charge of +2.19μC. How

    asked on January 30, 2010
  29. Math help

    I am so lost I have a problem. Two congruet figures. First trapezoid: 1 side b is 10 1 short base prarallel 6 Angle D 86 degrees Angle C 41 degrees Angle B ? Angle A ? Other angle J is 133 degrees Angle M ? Angle K ? Side d leg 17 Angle L ? long Base

    asked on April 16, 2013
  30. physics

    A hydraulic jack in a gas station lifts a 900kg car a distance of .25cm When a force of 150N pushes a piston through a distance of 20cm Find the IMA (book answer is 80) AMA (book answer is 59) Efficency (book answer is 74%) can you help, I have no idea how

    asked on February 21, 2010
  31. Geometry

    Where can the lines containing the altitudes of an obtuse triangle intersect? I. inside the triangle II. on the triangle III. outside the triangle A)I only B)I or II only C)III only D)I, II, or III PLEASE HELP ME ASAP!!!!

    asked on December 6, 2012
  32. skyline

    a scale model of a car is 8 inches long. the actual car is 12 feet long. what is the scale of the model?

    asked on January 23, 2013
  33. American Lit

    Compare and Contrast the characters Natty Bumppo in The Prairie and John in Hospital Sketches.

    asked on May 9, 2010
  34. Physics

    A car weighing 1.1*10^4 N is parked on a 35 degree slope. Find the force tending to cause the car to roll down the hill. What is the force the car exerts perpendicular to the hill?

    asked on December 7, 2009
  35. ap Calculus

    A right circular cone has a fixed slant height, s= 12 inches. Determine the radius and the height of the cone with maximum volume

    asked on November 5, 2008
  36. physics

    A bookshelf is at rest in a room. A force of 35.0 newtons is applied to a bookshelf. If the floor imparts a frictional force of 2.90 newtons, what is the net force acting on the bookshelf?

    asked on March 24, 2014
  37. Physics

    a 3.7 kg dog stands on a 19 kg flatboat at distance D = 6.1 m from the shore. It walks 2.6 m along the boat toward shore and then stops. Assuming no friction between the boat and the water, find how far the dog is then from the shore. _ _ _ _ _ _ m

    asked on November 18, 2009
  38. physics

    A student, crazed by the first physics Midterm, uses a pushing force of 80 N angled at 70° to push a 5.0 kg book across the frictionless ceiling of his room. a. What is the block's acceleration? b. What is the force of the ceiling on the book?

    asked on April 8, 2013
  39. Physics

    Among the safety features on elevator cages are spring-loaded brake pads which grip the guide rail if the elevator cable should break. Suppose that an elevator cage of 2000 kg has two such pads, arranged to press against opposite sides of the guide rail,

    asked on November 3, 2019
  40. programming logic and design

    I need help writing pseudocode for this problem: Design a retirement planning calculator for skulling financial services • Allow a user enter a number of working years remaining in the user career and the annual amount of money the user can save •

    asked on July 21, 2014
  41. math

    round to nearest hundred. 113, 279, 367

    asked on September 16, 2013
  42. ap chemistry

    Find the grams of NaF added to 300ml of .2M HF to create a buffer with pH=3.5.

    asked on November 15, 2007
  43. physics

    A 44 m diameter wheel accelerates uniformly about its center from 110 rpm to 320 rpm in 3.9 s. Determine the radial component of the linear acceleration of a point on the edge of the wheel 1.0 s after it has started accelerating. Determine the tangential

    asked on October 31, 2010
  44. Physics

    A 23 kg suitcase is being pulled by a handle that is at an angle of 22 degrees above the horizontal. If the normal force exerted on the suitcase is 185 N, what is the force applied to the handle? *** Objects NOT on an incline they are being pushed/pulled

    asked on December 7, 2009
  45. college physics

    the speed of light is about 3.00 x 10^8 m/s. convert this figure to miles per hour

    asked on September 7, 2008
  46. physics

    Compute your average velocity in the following two cases: (a) You walk 73.6 m at a speed of 1.79 m/s and then run 73.6 m at a speed of 4.31 m/s along a straight track. (b) You walk for 1.00 min at a speed of 1.79 m/s and then run for 1.30 min at 4.31 m/s

    asked on September 9, 2012
  47. geometry

    in segment pt, l is the midpoint of pa and a is the midpoint of pn. if pn = 17 and la = 3.5, what is the length of nt?

    asked on April 29, 2012
  48. physics

    A 4.8 kg block is pushed along the ceiling with a constant applied force of 87 N that acts at an angle of 55.0° with the horizontal, as in Figure 4-33. The block accelerates to the right at 6.00 m/s2. Determine the coefficient of kinetic friction between

    asked on December 5, 2010
  49. AP Chemistry

    Find the grams of NaF added to 300ml of .2M HF to create a buffer with pH=3.5.

    asked on November 15, 2007
  50. Math Geometery

    Is it possible to have more than one vertical line of symmetry? Why???

    asked on April 11, 2013
  51. physics

    The roof on a house rises 1.50 m over a horizontal diestance of 3.50 m. A 72.9-kg roofer stands on the roof. Is the frictional force that keeps the roofer from slipping equal in magnitude to F perpendicular or F paralell? What is its magnitude?

    asked on December 7, 2009
  52. math

    which number is this rounded too, the nearest ten or hundred? 557 rounds 560

    asked on September 16, 2013
  53. math

    A multiple-choice test has 10 questions. Each question has 5 choices. If a student answers each question by guessing randomly, find the probability that the student gets: a) at most 4 questions correct b) at least 7 questions correct Please show your work.

    asked on May 23, 2011
  54. math

    There are 6 boys and 8 girls in a group of students. Calculate the number of ways that a president, vice-president and treasurer can be selected. Please show your work.

    asked on May 23, 2011
  55. physics

    A 38.2 kg wagon is towed up a hill inclined at 19° with respect to the horizontal. The tow rope is parallel to the incline and exerts a force of 140 N on the wagon. Assume that the wagon starts from rest at the bottom of the hill, and disregard

    asked on December 5, 2010
  56. physics

    A 38.2 kg wagon is towed up a hill inclined at 19° with respect to the horizontal. The tow rope is parallel to the incline and exerts a force of 140 N on the wagon. Assume that the wagon starts from rest at the bottom of the hill, and disregard

    asked on December 5, 2010
  57. math

    A committee of 4 is chosen from a group of 10 women and 6 men. Determine the probability that at least 2 women are on the committee. Please show your work.

    asked on May 23, 2011
  58. calculus

    A golf ball of mass 0.05 kg is struck by a golf club of mass m kg with a speed of 50m/s will have an initial speed of v(m)=83m/(m+0.05) m/s. show that v'(m)>0 and interpret this result in context with the application. Compare v'(0.15) and v'(0.20) in

    asked on September 27, 2012
  59. Math

    A recipe calls for 3/4 cup of flour to make 18 cookies. How much flour is required per cookie?

    asked on February 1, 2020
  60. Public High School AP Physics B

    Ok I got a question I'm confused by the compression ratio bit in this problem and don't know how to do it If 3.00 m^3 of a gas initally at STP is placed under a pressure of 3.20 atm, the temperature of the gas rises to 38.0 degrees C. What is the volume? I

    asked on November 16, 2009
  61. algebra2

    The number of years that a stock of $40 increases to $50 at a rate of 8% per year can be written by the logarithmic expression: log1.08(50 over 40) a. use your calculator to determine how many years it will take for the stock to reach $50.

    asked on June 1, 2015
  62. Math

    The volume of a pyramid varies jointly with the base area of the pyramid and its height. The volume of one pyramid is 24 cubic inches when its base area is 24 square inches and its height is 3 inches. What is the volume of a pyramid with a base area of 10

    asked on September 3, 2017
  63. Phyics

    A 17-kg sled is being pulled along the horizontal snow-covered ground by a horizontal force of 28 N. Starting from rest, the sled attains a speed of 2.3 m/s in 10 m. Find the coefficient of kinetic friction between the runners of the sled and the snow.

    asked on September 26, 2013
  64. math

    A car license plate consists of 6 characters. The first 2 characters are any letter. The last 4 characters are odd numbers from 1 to 9 inclusive. How many different license plates are possible? Please show your work.

    asked on May 23, 2011
  65. Science

    Is this chemical equation correct and properly balanced, C3H4 + 5O2--> 3CO2 + 44H2O ?

    asked on January 13, 2011
  66. physics

    You are loading a refrigerator weighing 2250 N onto a truck, using a wheeled cart. The refrigerator is raised 1.00 m to the truck bed when it is rolled up a ramp. Calculate the minimum work that must be done by the force you apply and the magnitude of the

    asked on November 4, 2014
  67. Math

    Annie has quarters and dimes in her bank. There are 8 less than 4 times as many dimes as quarters. There is $6.35 in her bank. How many dimes are in her bank?

    asked on August 28, 2008
  68. math

    A company has two factories that manufacture tires. Suppose 65% of the tires are manufactured in factory 1 and 35% are manufactured in factory 2. In factory 1, 5% of the tires are defective. In factory 2, 2% of the tires are defective. a) Determine the

    asked on May 23, 2011
  69. English

    In the sentence Manuel is the new goalie on the team. What is the compound noun

    asked on October 30, 2008
  70. math

    Solve the following equations algebraically for n. Show your working using factorial notation. a) n!/3!(n-2)! = 12 b) 8Pn = 6720

    asked on May 23, 2011
  71. math

    Part 2: Now it’s time to make the guest list! Figure out how many guests you will have at your party, and how much it will cost to feed everybody. You have four grandparents coming. For the adults, you have your parents, your best friend’s parents,

    asked on April 23, 2010
  72. math

    There are 48 small gift bags. Each bag can hold 1 toy and 6 stickers. If an equal number of stickers are put in each bag, how many stickers will be in each bag?

    asked on November 6, 2007
  73. Calculus

    Find the volume of the solid formed by rotating the region inside the first quadrant enclosed by y = x^3 y = 16 x about the x-axis.

    asked on September 11, 2017
  74. Physics

    Two blocks of masses m1 = 2.00 kg and m2 = 4.50 kg are each released from rest at a height of y = 5.80 m on a frictionless track, as shown in the figure below, and undergo an elastic head-on collision. (a) Determine the velocity of each block just before

    asked on November 7, 2012
  75. Physics

    A coin slides over a frictionless plane and across an xy coordinate system from the origin to a point with xy coordinates (3.0 m, 4.1 m) while a constant force acts on it. The force has magnitude 2.4 N and is directed at a counterclockwise angle of 100°

    asked on October 30, 2009
  76. AP Physics

    A 239-kg log is pulled up a ramp by means of a rope that is parallel to the surface of the ramp. The ramp is inclined at 29.0° with respect to the horizontal. The coefficient of kinetic friction between the log and the ramp is 0.800, and the log has an

    asked on November 13, 2008
  77. chemistry

    What is the hydroxide concentration if the hydronium is .03 M?

    asked on October 22, 2007
  78. chemistry

    5Fe(2+ charge) + MnO4(-1 charge) +8H(1+ charge) -> 5Fe(3+ charge) + Mn(2+ charge) + 4H2O In a titration experiment based on the equation above, 25ml of an Acidified Fe(2+ charge) solution requires 14 ml of standard .050 M MnO4(1- charge) solution to reach

    asked on October 3, 2007
  79. Algebra 104

    1. A square piece of cardboard measuring 60 inches on a side is made into a rectangular box by cutting identical squares from the four corners and then folding up the flaps. Let represent the length of the side of the discarded square. Write a formula for

    asked on May 13, 2015
  80. algebra

    In Canada, $1 and $2 bills have been replaced by coins. When Marissa returned home from to San Francisco from a trip to Vancouver, she found that she had acquired 37 of these coins with a total value of $51 Canadian. How many each denomination did she

    asked on February 5, 2015
  81. math

    Part 2: Now it’s time to make the guest list! Figure out how many guests you will have at your party, and how much it will cost to feed everybody. You have four grandparents coming. For the adults, you have your parents, your best friend’s parents,

    asked on April 22, 2010
  82. chemistry

    if you have Ca(NO3)2 times xH2O do u count the Hydrate when looking for the mass % of Ca

    asked on October 17, 2007
  83. Math

    If I spend one third of my money on ice cream an half on a book what fraction of my money would I have left

    asked on January 31, 2018
  84. math

    if a driver is at an acute angle and wants to be completely straight as she enters the pool. what will be the measure of the angle her body will form then?

    asked on February 9, 2015
  85. Phyics

    A sprinter explodes out of the starting block with an acceleration of + 2.43 m/s2, which she sustains for 1.10 s. Then, her acceleration drops to zero for the rest of the race. What is her velocity at (a)t = 1.10 s and (b) at the end of the race?

    asked on September 24, 2013
  86. math help plesase????

    A person who weighs 130 pounds can burn about 300 calories per hour skateboarding. Write a function that relates the calories burned, c, to the number of hours, h, spent skateboarding. Identify the independent and dependent variable. Create a function

    asked on May 16, 2013
  87. chemistry

    Determine a compound that will precipitate the (Hg2)^2+ in Hg2X2(soluble).

    asked on October 15, 2007
  88. math

    What is the 8th term of (3x-1/2y)^10

    asked on May 23, 2011
  89. Physics

    To move a crate across a rough floor, you pull on it at an angle of 21 degrees above the horizontal. How much force is needed if the mass of the crate is 32kg and the coefficient of static friction between the crate and floor is 0.57

    asked on March 6, 2012
  90. science

    C3H8+5O2--->3CO2+4H2O is this chemical equation correct and equal? If not why?

    asked on January 13, 2011
  91. physics

    A box of books weighing 229 N is shoved across the floor by a force of 420 N exerted downward at an angle of 35° below the horizontal.If µk between the box and the floor is 0.57, how long does it take to move the box 9 m, starting from rest? (If the box

    asked on December 5, 2010
  92. Math help Geometery

    If, I ahve a trapezoid with two angles Angle 86 degrees and 41 degrees and angle A 133 degrees then,side b 10 Short base 6 How do I solve to get angle B?

    asked on April 16, 2013
  93. physics

    A box of books weighing 229 N is shoved across the floor by a force of 420 N exerted downward at an angle of 35° below the horizontal.If µk between the box and the floor is 0.75, how long does it take to move the box 7 m, starting from rest? (If the box

    asked on December 5, 2010
  94. AP chem

    This is part of a marathon problem, we have to identify the five compunds of H, N, and O described below. For each compound, I have to write a Lewis structure that is consistent with the information given. a.) All the compunds are electrolytes, although

    asked on November 7, 2007
  95. chemistry

    It requires 30ml of .5M H3PO4 to titrate 45ml of Ca(OH)2 to the equivalence point. What is the M of the base?

    asked on October 3, 2007
  96. Science

    What is the morality of a solution made by dissolving 9.80 g of H2SO4 in a 200.0 g of H2O?

    asked on April 2, 2017
  97. math

    There are 6 boys and 8 girls in a group of students. Calculate the number of ways that a committee of 3 students which has at least 1 girl can be selected from the group. Please show your work.

    asked on May 23, 2011
  98. math

    The freshman class is building a float for homecoming.One side of the float has a shape of a parallelogram with base of 12' and height of 6'. To complete the float the class must buy tissue to cover the side. It takes 3 boxes of tissue to cover each foot.

    asked on April 4, 2011
  99. Music

    How do you download music from jiskha?

    asked on March 2, 2010
  100. Algebra

    What if the last term has a square root that is a big, long decimal? you wouldn't use the decimal, would you?

    asked on April 22, 2008

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